Question 1

What size solar panel does it take to power this, or if anyone has tried it?

Accepted Answer

This thing uses a surprising amount of electricity. And it's VERY poorly insulated, so as soon as it stops running it heats up quickly.

In full sun, a 100w solar panel will work, but no matter where you are (assuming the US) you'll only get 4-5 hours of full, direct sun per day. The other problem is that this cooler is very poorly insulated. The top isn't even airtight.

So that means it will start to warm up about half an hour after the sun is no longer directly overhead. To get around this you'll need several (3-4) 100w panels and at least 100-150 mah of battery storage if you want to keep something cold for one day.

Question 2

Is this cooler reasonable to use on very long trips during which it will only be on while we are driving? No way to run it overnight as we're camping

Accepted Answer

Depends on how long the trip is. I use mine on a regular basis every month on a 250 mile trip. Works great, just wish I'd bought the square one instead of the rectangle one. It's great for sodas and such but the square one will accommodate larger items. Hope this helps. You should buy the adapter, as I did. You can get it pre-cooled or heated before your trip, and plug it in to 110v when available.

Question 3

What are the interior dimensions of this cooler?

Accepted Answer

Not sure what the exact dimensions are but I can stand up 6 20 oz bottles of soda and have room to put things on top of the bottles and alongside the bottles, I am an over the road truck driver and I LOVE IT!!

Question 4

How well does it cool when it's not powered up, in terms of hours in a 90 degree summer, how long can I expect to have cold drinks?

Accepted Answer

Seriously doubt your drinks would be cold for very long in that situation.  First, this isn't a fridge but a cooler. Myself, have never had reason to use this without it being hooked up to electricity.  If you must unplug this while in use, suggest using some of the blue ice items to help keep your drinks cold.  That should give you an hour or more.

ASIN	B00009PGNS
Additional Features	Portable
Best Sellers Rank	#102,264 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #491 in Camping Coolers #6,410 in Kitchen Small Appliances
Brand	Koolatron
Brand Name	Koolatron
Capacity	17 Liters
Chamber Depth	17.25 Inches
Chamber Height	42.55 Centimeters
Color	Gray
Container Type	Cans
Customer Reviews	4.0 out of 5 stars 1,513 Reviews
Global Trade Identification Number	00059586500206
Included Components	12V DC Power Plug
Insulation Material Type	Polyurethane Foam
Item Dimensions D x W x H	17.75"D x 9.25"W x 16.75"H
Item Type Name	12-Volt Compact Electric Cooler and Warmer - 18 Quart
Item Weight	5 Pounds
Manufacturer	Koolatron
Manufacturer Part Number	P-20WH
Material	Plastic
Material Type	Plastic
Model Name	P20
Model Number	P20
Package Information	Cans
Pattern	Solid
Product Dimensions	17.75"D x 9.25"W x 16.75"H
Size	18 Quart
Team Name	Koolatron
UPC	059586500206 772418181809 798527585987
Unit Count	1.0 Count
Warranty Description	1 Year Limited

Koolatron P-20 Thermo - Electric 12-Volt 18 Quart Compact Cooler/Warmer

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